岩土工程学报2013，Vol.35Issue(6)：1172-1177,6.
基于Hoek-Brown准则对板岩抗拉强度研究
Tensile strength of slate based on Heok-Brown criterion
摘要
Abstract
The slate and other layered rock often have a variety of structural surfaces,and the tensile strength of the rock mass enjoys greater difference under different levels of inclination.To reveal the tensile strength anisotropy of slate,a formula for the tensile strength of disc change of bedding angle β is derived based on the Heok-Brown criterion and analytical solution of the elastic mechanics for Brazilian disc plane stress.According to the results of uniaxial and Brazilian splitting tests on samples with different bedding angles β,the following goals are achieved:the parameters of the formula for the tensile strength,the compressive strength of anisotropic degree Rc between 3.94 and 4.87,the tensile strength of anisotropic degree R1 between 2.86 and 3.15,and the trend of compressive (tensile) strength which reaches the maximum value in the middle and the minimum one at the two sides.In addition,the derivation of the proposed formula can explain the relationship between the tensile strength and the bedding angle.This work may provide some reference for layered rock in similar tensile state.关键词
Hoek-Brown准则/层理角度/板岩/抗拉强度Key words
Hoek-Brown criterion/ bedding angle/ slate/ tensile strength分类
建筑与水利引用本文复制引用
刘运思,傅鹤林,饶军应,董辉,张海明..基于Hoek-Brown准则对板岩抗拉强度研究[J].岩土工程学报,2013,35(6):1172-1177,6.基金项目
国家自然科学基金项目(50878213,51108397) （50878213,51108397）
湖南省研究生创新项目(CX2012B057) （CX2012B057）
